chore(package): update @types/chai to version 4.2.4

Closes #152

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
   },
   "homepage": "https://github.com/inversify/inversify-inject-decorators#readme",
   "devDependencies": {
-    "@types/chai": "4.2.0",
+    "@types/chai": "4.2.4",
     "@types/mocha": "5.2.7",
     "@types/sinon": "7.0.13",
     "chai": "4.2.0",